Removes the ability to close or minimize the hung renderer dialog

on Mac.  I'm leaving the window resizable for now, because I dislike
non-resizable windows.  This is easy enough to change later.

BUG=None
TEST=After bringing up the dialog, verify that the only way to dismiss
it is by pressing either the wait button or the kill button.
Review URL: http://codereview.chromium.org/151009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20044 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/nibs/en.lproj/HungRendererDialog.xib

@@ -35,7 +35,7 @@
 				<string key="NSClassName">NSApplication</string>
 			</object>
 			<object class="NSWindowTemplate" id="1005">
-				<int key="NSWindowStyleMask">15</int>
+				<int key="NSWindowStyleMask">9</int>
 				<int key="NSWindowBacking">2</int>
 				<string key="NSWindowRect">{{196, 264}, {480, 246}}</string>
 				<int key="NSWTFlags">536870912</int>
@@ -564,9 +564,9 @@
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{445, 189}, {480, 246}}</string>
+					<string>{{441, 138}, {480, 246}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{445, 189}, {480, 246}}</string>
+					<string>{{441, 138}, {480, 246}}</string>
 					<reference ref="9"/>
 					<string>{196, 240}</string>
 					<string>{{357, 418}, {480, 270}}</string>
@@ -645,7 +645,7 @@
 					</object>
 					<object class="IBClassDescriptionSource" key="sourceIdentifier">
 						<string key="majorKey">IBProjectSource</string>
-						<string key="minorKey">browser/cocoa/hung_renderer_dialog_cocoa.h</string>
+						<string key="minorKey">browser/cocoa/hung_renderer_controller.h</string>
 					</object>
 				</object>
 				<object class="IBPartialClassDescription">

chrome/browser/cocoa/hung_renderer_controller.mm

@@ -51,13 +51,15 @@ HungRendererController* g_instance = NULL;
   if (hungContents_)
     base::KillProcess(hungContents_->process()->process().handle(),
                       ResultCodes::HUNG, false);
-  [[self window] performClose:nil];
+  // Cannot call performClose:, because the close button is disabled.
+  [self close];
 }
 
 - (IBAction)wait:(id)sender {
   if (hungContents_ && hungContents_->render_view_host())
     hungContents_->render_view_host()->RestartHangMonitorTimeout();
-  [[self window] performClose:nil];
+  // Cannot call performClose:, because the close button is disabled.
+  [self close];
 }
 
 - (int)numberOfRowsInTableView:(NSTableView *)aTableView {
@@ -103,13 +105,7 @@ HungRendererController* g_instance = NULL;
   DCHECK(contents);
   DCHECK(hungContents_);
   if (hungContents_ && hungContents_->process() == contents->process()) {
-    // If you switch tabs with the dialog open,
-    // HungRendererDialog::EndForTabContents() is called after the
-    // RWHV is hidden.  performClose: runs a nested message loop,
-    // during which the RWHV is drawn at least once, failing a DCHECK
-    // that ensures it is never drawn while hidden.  The workaround
-    // here is to call close, which closes the window immediately with
-    // no nested message loop.
+    // Cannot call performClose:, because the close button is disabled.
     [self close];
   }
 }

chrome/browser/cocoa/hung_renderer_controller_unittest.mm

@@ -28,7 +28,8 @@ TEST_F(HungRendererControllerTest, TestShowAndClose) {
   // Doesn't test much functionality-wise, but makes sure we can
   // display and tear down a window.
   [hung_renderer_controller_ showWindow:nil];
-  [[hung_renderer_controller_ window] performClose:nil];
+  // Cannot call performClose:, because the close button is disabled.
+  [hung_renderer_controller_ close];
 }
 
 TEST_F(HungRendererControllerTest, TestKillButton) {